Sewing machine



April 20 1926.

J. P.,WE|$

SEWING MAQHINE original Filed June 28, 1921 '5 Sheets-Sheet 2 INVENTOR.Jan/VB M/s.

April 20, 1926.

.1. P. was SEWING MACHINE 5 Sheets-Sheet 5' Original Filed June 28. 1921INVENTQR. by Jim/v I? M15.

ATTO

April 20 1926.

J. P. WEIS SEWING MACHINE original Filed June 28. 1921 5 Sheets-Sheet 4April 20,1926.

- J. P. WEIS SEWING MACHINE Original Filed June 28, 1921 5 Sheets-Sheet5 Patented Apr. 20, 1926.

hairs STATES PATENT err-ice.

JOHN B VTEIS, OF NYAGK, NEW YORK, ASSIGNOR TO nnrnoronrran SEWING MA-CHKNE CORPORATION, OF NE'ACK, NEW YORK, A CORPORATION OF DELAWARE.

snwrno MACHINE.

origina1 application filed June 28, 1921, Serial N'o. 81,032. Divided.and this application fileii October which the following is aspecification.

- This invention relates to sewing machines, an object thereof beingproved construction of machine frame, tubular'worl; arni and overhangingarm, which will be relativelycheap, simple and stronger in construction.The invention embodies an improved tubular. work arm supported in animproved manner by the machine frame, and lightenistronger, smaller insize than heretofore, and at the same time uniform in size, the work armbein adapted to house and support various mechanisms such as the feedand thread control mechanisms. The

invention also. includesthe provision of an arm in which a steelimproved overhanging V tube is integrally cast into the arm, thisconstruction having 1mportant advantages,

' especially in mounting an operating shaft therein.

This application is a division of mvcopending application for sewingmachines filed June 28, 1921, Serial No. 481,032.

pear in the following description and appended claims, reference beinghad to the accompanying drawings forming a part of this specification,wherein like reference characters indicate corresponding parts in theseveral views, and wherein Fig. 1 is a side. elevation of the machinewith the end cap or cover of the looper mechanism shown in dottedli andthe transmitter shown in operating position under the machine, butdetached from the work table to more clearly illustrate the relation ofthe transmitter with the sewing machine; Fig. 2 is a front perspectiveview of the sewing machine, transmitter and treadle connected foroperating the same; Fig. 3 is a perspective view of the end cap forcovering the looper and thread controlling mechanisms; Fig. 4 is a sideelevation illustrating the forwardly exteudingcylinder and also showingapart of to. provide an im-.

.Other objects of this invention will ap 31, 1923. Serial No. 671,87 t.

'- looper thread control means supported Within the cylinder; Fig. 6 isa side elevation showing the frame and work support and the feedmechanism; Fig. 7 is an end elevation of the cylinder and the looperactuating mechanism Fig. '8 is a side elevation illustrating theconstruction of the overhanging arm of the machineframe; Fig. 9 is anend elevation carrying the needle vibrating mechanism; and Fig. 10 is anend View showing operating means for the cross stitch mechanism.

Before explaining in detail the present improvement and mode ofoperation thereof, I desire to have .it understood thatthe invention isnot limited to the details of constructionand arrangement 'of partswhich h are illustrated in the accompanying drawings, since theinvention is capable ofother embodiments, and that the phraseology whichI employ is for the purpose of clescription and not of limitation.

Referring to the, drawings it will be seen that the prcsent machineisfmounted upon a suitable table 1 and comprises a machine frame ofspecial construction having flanges 2 and 3 for supporting and securingthe machine to the table. The main portion of the frame is preferably ofhollow rectangular construction, closed at the bottonnand having afrontwall 4 and a rear wall 5 provided with. an openingadapted-to be closedby means of a cover plate 7 attached thereto in any suitable manner.'This cover-plate is provided with'a hollow projecting portion 8 withinwhich operates a stop lever for the stopping and starting mechanism ofthe machine. The front wall 4 of the machine frame isshown in Fig. 6 asterminating at its lower end in abored casting having a forwardlyprojecting boss 11, into and through the bore of which the end of acylinder 12 7 projects a'substantial distance into the interior of thehollow frame. The side wall 13 0f the frame is provided with a boss 14for receiving one of the crank shaft bushings 15, theopposite side wallhaving secured thereto a suitable belt guard 22 which covers the-drivingbelt 23.

Mounted in end bearings 15' and 99 of the frame and in suitableintermediate bearings is a transversely extending crank shaft (notshown) having a clutch wheel 93 provided with a suitable belt grooveover which passes driving belt 23 of the transmitter. A detail theforward end of this rock shaft is a needle bar operating arm 41. At theouter I end of the arm 41 is pivotally secured a link 45, the lower endthereof being pivotally connected to the upper end of the needle bar'48. Secured to the lower end of the needle.

bar is a needle holder carrying needles 51. To the rear end of the rockshaft 39 is secured a crank arm 57 and ball stud 58, to which isconnected the upper end of a ball connection 59. The lower end 60 alsohas a ball socket to fit over the ball 61 of the crank shaft 62.

The crank shaft carries a driving gear 483 whichmeshes with a similargear 484 secured to a shaft 485. These gears are located within themachine frame and the shaft 485 is rotated thereby from the crank shaft.The shaft 485 is supported in a rear bearing 487 and in a front bearing488, these bearings being secured in a horizontal tube 489 east in theL-shaped arm 32 of the machine frame. In constructing the overhangingarm in this manner a hole is left for the shaft 485 thereby eliminatingthe necessity as well as the expense of drilling the same. By integrallycasting the metal of the arm 32 around the steel tubing 489 and intouniform engagement with the exterior walls thereof,

the cost of construction is greatly reduced, the overhanging arm isconsiderably strengthened, and it is merely necessary to first enlargeor counterbore each end of the steel tube in order to insert thebearings 487 and 488 for the shaft. Furthermore it will be noted thatthe steel tube 489 extends rearwardly of the front wall 4 of the machineframe into the chamber of the frame, thereby supporting the rear end ofthe shaft 485 and gear 484 which overhang the crank shaft of themachine.

In other words, the tube 489 before casting the frame may becounterbored at opposite ends and the bearings 487 and 488 secured inposition, and thereafter the steel tube 489 cast into the overhangingarm. This construction has the further advantage of reducing thefriction of the shaft 485, permitting greater accuracy in construction,and at the same time providing adequate space 490 for the passage oflubricant.

The shaft 485 may be utilized to operate various stitch controllingmechanisms or devices, such as a trimmer, ruifler, top feed, etc, and inthe present instance mechanism is connected thereto for operating across stitching mechanism and for vibrating the needle bar. Adjacent tothe forward end of the bearing 488 and secured to the shaft 485 is agear 493 meshing with a gear 495 secured connected to the rotary shaft497 for operation, the construction of this mechanism being described inmy aforesaid co-pending application.

As illustrated in Figs. 8 to 10 inclusive, the cross stitch drivingmechanism may be utilized for operating a zig-zag needle, one form ofmechanism for vibrating the needle bar being shown in Figs. 8 and 9. Atthe forward end of the shaft 485 is located a triangular cam oreccentric 527 which is secured to the shaft. This cam operates in a fork530 which straddles the cam, the fork being carried by an arm 531 whichextends downwardly and is secured at 532 to the boss 534 of a swingingbearing 535. This bearing is bored to receive the lower and upperbushings 53 and 54 which guide the needle bar 48, and has a taperedcircular disk 536 which is seated in a circular socket formed in theface 538 of the head 33 of the overhanging arm. One-half of the circularsocket is formed with a beveled circular plate 539 secured by screws540, so that the swinging hearing may rock therein and be held againstlost motion.

From the foregoing construction it will be seen that the rotation of thecam or eccentric 527 by the shaft 485 will impart through the member 531a vibratory swinging movement to the needle bar, the needle bar at thesame time being reciprocated through mechanism operated from the rockshaft 39.

The power transmitter comprises in general a main bracket 143 secured tothe bottom of the table in any suitable manner, the bracket having anarm bored to receive a shaft 144. Upon this shaft is mounted a conepulley 145 over which operates a belt 146 for transmitting power fromany suitable line shaft to the pulley. The belt 23 is driven by a pulley149 for operating the sewing machine. Suitable clutch mechanism for thepulleys 145' and 149 is provided which is controlled by means of a rod156 connected to a floor'treadle 159. A further detailed description ofthe power transmitter mechanism is not deemed necessary herein since thesame is fully described in my co-pending application.

The forwardly extending cylinder or work support or arm 12 is preferablyconstructed of steel tubing of small diameter, and has the same diameterfrom one end to the other, which construction has the importantadvantage of enabling small tubular goods or work to be handled withgreater facility than in the case as heretofore when the tubular supportis tapered from the machine frame towardthe free end thereof, as itenables the tubular goods to be pushed back entirely to the rear end ofthe horn. Moreover, the sheet metal or steel tubingconstruction providesa: horn of considerably greater strength and rigidity than heretoforewhen formed as a casting, and also eliminatingthe necessity asheretofore of tapering the horn at the rear end or otherwise increasingits diameter for adequately supporting it from the machine frame. Thesteel tubing structure in addition provides a cylinder of equal diameterthroughout having much thinner walls, thus materially decreasing thediameter of the cylinder so as to accommodate small tubular goods, whichwas heretofore impossible in the case where the horns were castingshaving relatively thick walls. The

sheet metal or steel tubing construction in addition provides a lighterhorn as well as a stronger horn, so that the length of the horn may beincreased to accommodate more goods. A further advantage in theapplicants construction resides in a material reductiOn in the cost ofmanufacture.

Furthermore the cylindrical construction enables the tubular goods,after stitching to be easily drawn by the operator over the cylindersubstantially as far as the rear of the cylinder which is ordinarilyimpossible in the case of a tapered horn, so that as a result a largerquantity of tubular goods or work may be supported at one time on thecylinder.

In the present machine the cylinder is detachably secured in the boss 11by spot clamping screws 3% permitting the cylinder to be removed andreplaced by disconnecting the operating means for the looper and feedwithin the rear trunk of the machine. To prevent the leakage of oilbetween the cylinder 12 and the boss 11 a wick insert 350 of suitablematerial is provided which fits into, a groove of the cylinder 12 toform a leak proof oint between the parts.

The cylinder 12 houses and supports the feeding mechanism and the looperand looper thread control mechanisms, the construction and operation ofsuch mechanisms be-- ing fully shown and described in my above mentionedco-pending application. In Figs.

and 5 the looper shaft 292 is illustrated, together with the loopers 311and 312 controlled thereby. The looper shaft 292 is driven from thecrank shaft of the machine by means of crank connection 2% connected tothe ball" crank 26? of the crank shaft. In Fig. 5 the forward end of thelooper shaft 292 is shown together with the various parts of the threadcontrol mechanism.

In Fig. 6 is shown the feed bar 232 extending through the cylinder andcarrying at its outer end feed dog 208. The feed bar is operated fromthe crank shaft by means of a pitman 234 connected to the ball crank 69of the crank shaft.

As described in my aforesaid co-pending application, the feed baractuating mechanism is adjusted during operation by means of anadjusting screw 255 located in a hollow tube or post 240, the lower endof which is secur d as at in the machine casting and has a flattenedguide 2&3 cooperating with the feed bar 23. The cylinder 12 is slottedor cut-away at 12 to permit the guide 2-1-3 to extend therethrough.

Co-acting with the stitching and feeding mechanism supported by thecylinder 12 is a throat plate 33% which is secured to a forward bearing2&8 of the cylinder by means of screws The throat plate is provided withthe usual feed slots 33? through which operate the serrated surfaces ofthe feed dog, the throat plate also being provided with the usual.needle holes through which the needles operate. The throat plate is ofsegmental construction forming with the cylinder 12 a complete circlewhen attached thereto, the cylinder being cut away on the lines 338- 333to receive the throat plate. A longitudinally projecting tongue 338 ofthe throat plate cooperates with a groove or slot formed in thecylinder, so that the projecting portion 339 overlaps the tongue 338*,thereby securely holding the rear end of the plate from tipping ormoving when the pressure of the foot is brought to bear upon the outeroverhanging end of the throat plate.

Thus it will be seen that the opening 338 at the top of the cylinderextends rearwardly a substantial part of the cylinder length, and thatthe elongated throat plate has a portion, which forms a cover for theopening, of greater length than the. portion 340 projecting beyond theend of the cylinder, the throat plate forming a combined throat andcover plate thereby facilitating ingress to the cylinder, increasing itsrigidity and decreasing the cost of construction. Furthermore the throatplate is fastened to the hearing 248 only, by two screws 335, near theforward end of the cylinder, whereas the rear end of the plate isinterlocked with the cylinder and held against upward movement by virtueof the side edges of projection 339 overlapping or overhanging the innerside edges of projections 338. The throat plate may be readily detachedby removing the screws and sliding the plate forwardly so as to free theprojections 338 from the projection 339 of the cylinder.

The forwardly extending end 340 of the throat plate is provided withbeveled or inclined edges 34-1, and an end cap or cover 343 fitsthereover, the dove-tailed grooves 342 of the cap cooperating with theinclined portions 8 11 and hence the same may be shifted on and off theforward end of the throat plate. The side walls of the cap at 3 14 arepartially slotted to make them flexible so that the cap will yield andproperly fit over the beveled or inclined edges of the throat plate. Theend cap is hollow to provide free Working space for the loopers andother parts adj cent thereto. In order to secure the cap 3 1-3 to thecylinder and prevent it from becoming disengaged from the throat plateduring the operation of the machine the cap is provided with suitablelocking means comprising alock spring or latch 343 projecting through anopening 343 for convenient manipulation by the operator, the cap beingremoved by pressing inward on the spring to disengage the hook end M3from a notch 3&3 formed in the side wall of the cylinder 12. This lockspring is suitably secured inside of the end cap as by a screw 3&3.

The cylinder 12 may be provided at its forward end with a projectingportion 3-15 extending outwardly to correspond in length approximatelywith the overhanging portion 34-0 of the throat plate, an extension 3 15being provided with an end wall 34:6 to prevent lubricant from escaping.The curved side walls 347 of this extension are adapted to lie injuxtaposition to the curved walls of the cap 343 thereby forming a.support upon which the bottom edge of the end cap rests.

It will be seen that by reason of the fact that the feeding and loopermechanisms are arranged and supported within the cylinder 12, the samehaving the enlarged opening covered by the throat plate extending aconsiderable distance in the rear of the needles I may do away with theuse of a cover plate, and as a result of this construction greaterrigidity of the parts is secured, as well as free access to the interiorof the cylinder, thus eliminating loose parts with the added advantageof using a cylinder of equal. diameter throughout its length.

It will be noted that the bearing 248 is located at the forward open endof the cylinder, and is detachably secured in position by means ofscrews 293. This bearing 2&8 supports the forward end of looper shaft282, and also guides the feed bar 232, and may be readily removed whenworn and renewed simply by detaching the looper parts on the end of thelooper shaft, detaching the feed dog 20S, and removing screws 293. Thethroat plate is secured to the cylinder through the medium of bearing248, this liiearing being located approximately mid way of the length ofthe throat plate, and it will be seen that the throat plate extends inrear of the. bearing a substantial distance to form a removable coverfor the forward part of the cylinder, and also extends in front of thebearing to form a support for a detachable end cap or cover.

The rear end of the looper shaft 282 operates in a bearing 286secured-in the cylinder 12 by screws 287, the bearing having an opening288 at the top thereof to provide a working space for the feed bar, andalso iaving two saw cuts 289 in the front and rear walls diametricallyopposite the hole in the hearing within which operates the looper shaft282, the bearing thus having the opposite ends thereof resilient topermit adjustment thereof to compensate for wear. Clamping screws 290are provided to adjust the saw cuts for adjusting the bearing portionsto lit the shaft 282 thereby taking up wear. The rear wall of thebearing is recessed at 291 to provide clearance for the bottom cap 276of the feed actuating mechanism. Thus the bearing 286 is adjustable withrespect to the cylindrical inner wall of the cylinder and the loopershaft, and it will be noted that by unscrewing the front bearing 248 andthe rear bearing 286 the entire looper and feed mechanisms together withthe bearings may be slid out endwise through the cylinder to remove orassemble them.

It is to be understood that by describing in detail herein anyparticular form, structure, or arrangement, it is not intended to limitthe invention beyond the terms of the several claims or the requirementsof the prior art.

Having thus explained the nature of my said invention and described away of constructing and using the same, although without attempting toset forth all of the forms in which it may be made, or all of the modesof its use, I claim:

1. In a sewii'ig machine, the combination of a machine frame, aforwardly extending tubular supporting member connected thereto andhaving a throat plate, an end cap connected to said throat plate, andmeans for releasably locking said cap to said support ing member andcomprising a spring latch.

2. In a sewing machine, the combination with a machine frame of aforwardly extending work arm of steel tubing.

In a sewing machine, the combination with a. machine frame of aforwardly extending work arm of steel tubing of substantially uniformdiameter from end to end.

1. In a sewing machine, the combination with a machine frame of aforwardly projecting work arm of steel tubing of substantially uniformdiameter from end to end, said arm having one end projecting into andthrough the wall of the machine frame and detachably secured thereto.

5. In a sewing machine, the combination of an upright machine frame, aforwardly projecting tubular work arm detachably connected to saidframe, a shaft extending through said work arm, a bearing for said shaftmounted Within the rear end of said arm and detachably connectedthereto, said work arm being detachable with said shaft and bearing fromthe frame, and said bearing being detachable from the end of the workarm relatively to said shaft.

6. In a sewing machine, the combination of an upright machine frame, aforwardly projecting tubular work arm detachably connec-ted to saidframe, a shaft extending through said work arm, a bearing for said shaftdetachably mounted within the rear end of said arm, said bearing beingtrans versely split at one side of the shaft to form a pair ofadjustable portions, and an ad justing screw connecting said port-ionsfor adjusting them relatively to said shaft.

7. In sewing machine, the combination of an upright machine frame,,a'forwardly srojecting tubular work arm .detachably connected to saidframe, a shaft extending through said work arm, a pair of bearings forsaid shaft detachably mounted within the rear and forward ends of saidarm, said arm being detachable with the shaft and bearings from theframe and each of said bearings being detachable from an end of the workarm relatively to said shaft.

8. In a sewing machine, the combination of a machine frame, a forwardlyextending tubular work support carried thereby, a throat plate carriedby said support and having an overhanging portion projecting beyond theend of the work support, and an end cap circiunferentially slotted toprovide a resilient side Wall detachably connectedto said overhangingportion.

9. In a sewing machine, the combination of a machine frame, a forwardlyextending tubular work support carried thereby, a throat plate carriedby said support and having an overhanging portion projecting beyond theend of the work support, and an end cap c-ircumferentially slotted atopposite sides to provide a pair of expansible and contractible sidewalls detachably connected to the side edges of said overhangingportion.

10. In a sewing machine, the combination of a machine fraine, a tubularsteel work support extending therefrom and detachably connectedthereto,and a detachable bearing located within said support, said work supportand bearing being detachable together from the frame and said bearingbeing detachable from the end of the work support.

11. In sewing machine, a machine frame having an overhanging arm, saidarm being strengthened by a longitudinally extending steel tubeintegrally cast thereinto, and an operating shaft extending through saidtube. 12. In a sewing machine, a machine frame having an overhangingarm, said arin being strengthened by a longitudinally extending steeltube integrally ast thereinto, with the metal of the arm engaging aroundthe walls of the tube substantially from end to one. thereof, and anoperating shaft extending through said tube.

13. In a sewing machine, a machine f 'ame having an overhanging arm,said arm being strengthened by a longitudinally extending steel tubeintegrally cast therein, the metal of the arm engaging the walls of thetube, said tube extending rearwardly of the arm into the frame, and anoperating shaft extending through said tube and into the frame.

14. In a sewing machine, a machine frame having an overhanging arm, saidarm being strengthened by a steel tube integrally cast therein andextending longitudinally of the arm substantially throughout the lengththereof, and an operating shaft extending through said tube.

Signed at Nyack, New York, this 29th day of Oct., 1923.

JOHN P. IVEIS.

